HTTPS connection to LiveCycle/AEM Forms server fails because the Windows 10 security update removes support for certain SSL protocols. To resolve this issue:

Use a proxy, such as Apache proxy.
If your setup is already using a load balancer or a proxy, or if you have introduced a new proxy server, you can modify proxy settings to resolve SSL connection failure issue. As long as your proxy server does not rely on the weak Diffie Hellman keys, using a proxy should resolve the issue.
For the new proxy server, existing proxy server, or the load balancer: ensure that it bears the same domain name as your LiveCycle/AEM Forms server.

Perform the following steps to verify that the server adminui page opens in Internet Explorer:

Using Internet Explorer on Windows 10, open https://<server>:<port>/adminui.